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Polariton-Polariton Interactions Revealed in a One-dimensional Whispering Gallery Microcavity.

Authors
  • Tian, Chuan1
  • Zhou, Beier2
  • Xu, Chunyan1
  • Zhang, Yingjun1
  • Zheng, Xiamei1
  • Zhang, Jian1
  • Zhang, Long2, 3
  • Dong, Hongxing2, 3
  • Zhou, Weihang1
  • 1 Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China. , (China)
  • 2 Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai, China. , (China)
  • 3 Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, No.1, Sub-Lane Xiangshan, Xihu District, 310024 Hangzhou, China. , (China)
Type
Published Article
Journal
Nano Letters
Publisher
American Chemical Society
Publication Date
Mar 11, 2020
Volume
20
Issue
3
Pages
1552–1560
Identifiers
DOI: 10.1021/acs.nanolett.9b04121
PMID: 32097561
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Coulomb interactions are essential to the dynamics and optical properties of exciton-polaritons. Here, we report an experimental observation of polariton-polariton interactions far beyond theory in a one-dimensional whispering gallery microcavity. Based on the unique half-light half-matter nature, we were able to clarify the effects of excitons, quantum confinement, and nonthermalized polariton distribution in the measurements of the polaritonic interactions. Spectacularly, our position-scan and power-scan investigations both revealed that the polariton-polariton interaction strength is up to 2 orders of magnitude larger than theoretical predictions. These results suggest that polaritonic interactions are far more complicated than the expectation and should be re-examined in polariton physics and devices involving polaritonic interactions.

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